Safe Haskell | None |
---|---|

Language | Haskell2010 |

Some utility functions used by the other modules

# Difference lists

# Misc.

reindex :: (Integral a, Ix a) => [a] -> a -> a Source

Given a list `is`

of unique natural numbers, returns a function that maps
each number in `is`

to a unique number in the range `[0 .. length is-1]`

. The
complexity is O(`maximum is`

).

:: Ix a | |

=> (a, a) | Upper and lower bound on the elements to be counted |

-> [a] | Elements to be counted |

-> Array a Int |

Count the number of occurrences of each element in the list. The result is an array mapping each element to its number of occurrences.

fullPartition :: (a -> a -> Bool) -> [a] -> [[a]] Source

Partitions the list such that two elements are in the same sub-list if and only if they satisfy the equivalence check. The complexity is O(n^2).